Abstract : The performance in combat of a division slice of BLUE artillery is a function of its weapon-ammo mix, ammo basic load and resupply, fire direction center (FDC) capability, movement policy, firing policy, weapon reliability, and weapon repair capability as well as RED anti-artillery capabilities such as counterbattery acquisition systems, counterbattery fire capability, and electronic warfare capability. These factors are taken into account by AFSM as it calculates the damage that a BLUE artillery force could do to a given RED threat force which is represented by a list of target acquisitions generated by an external war game. The User Manual contains: a. An overview of the AFSM computer program including a conceptual flow- chart and brief explanation of the model. b. A detailed description of the input required to execute the program. c. A description of the output. d. A sample problem with fictitious inputs and the resulting output. e. A glossary defining the important variables in AFSM.